Menlo Park city council approved an environmental impact report and developmental agreement for a project that will bump the number of employees up to about 6,600

Facebook got the green light to expand its headquarters in Menlo Park, California to boost its head count over 6,000 employees.

Currently, the social network has 2,200 employees in Menlo Park. But yesterday, the Menlo Park city council approved an environmental impact report and developmental agreement for a project that will bump that number up to about 6,600.

All five city council members voted yes at the meeting last night.

"The bottom line is that we have a development agreement with Facebook that we're excited about," said Kirsten Keith, mayor of Menlo Park. "We're excited to have Facebook as our neighbors. I am pleased with what we have come up with."

Facebook will pay Menlo Park $850,000 per year for a 10-year period to cover the impact of the additional workers. It will also pay a one-time fee of over $1 million for capital improvements.

In addition, Facebook plans to establish a $500,000 community improvement fund, high school internship programs and job training seminars.

The social giant is also looking to build a new campus, which is a 22-acre site across the Bayfront Expressway. The site is to include could include five new buildings total, and it will be connected to the current Menlo Park campus via an underground crossing. Both campuses combined will likely have around 9,400 employees, and it should be complete in 2014.

All of the new changes to Menlo Park have concerned neighboring cities like Atherton, which said traffic at intersections could be an issue with all of the new employees. Both cities are currently in talks trying to come up with an agreement. Facebook offered suggestions such as employee carpool options.

Expanding its headquarters isn't the only big news Facebook has revealed recently. The social network launched the largest IPO in history this month, which valued the company at over $100 billion. Facebook also announced that it plans on creating its own smartphone software by next year and may purchase Opera Software for $1 billion.

That is because Menlo Park is a very high income, very eco-conscious area. This is an area where people regularly make well over 6 figures, and would prefer nothing more than a quiet environment to live in. By expanding it's workforce, FB could potentially ruin the area with noise and traffic pollution.

This is effectively the same as asking the Beverley Hill council to approve the increase of company size. There are going to have a lot of cost associated with that request.